looking-glass/idd/LGIdd/Debug.cpp
2023-10-20 15:36:34 +11:00

52 lines
No EOL
2 KiB
C++

/**
* Looking Glass
* Copyright © 2017-2023 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <Windows.h>
#include <malloc.h>
#include <strsafe.h>
/* credit: https://stackoverflow.com/questions/29049686/is-there-a-better-way-to-pass-formatted-output-to-outputdebugstring */
VOID _DBGPRINT(PCSTR kwszFunction, INT iLineNumber, LPCSTR kszDebugFormatString, ...) \
{
INT cbFormatString = 0;
va_list args;
PCHAR szDebugString = NULL;
size_t st_Offset = 0;
va_start(args, kszDebugFormatString);
cbFormatString = _scprintf("[%s:%d] ", kwszFunction, iLineNumber) * sizeof(CHAR);
cbFormatString += _vscprintf(kszDebugFormatString, args) * sizeof(CHAR) + 2;
/* Depending on the size of the format string, allocate space on the stack or the heap. */
szDebugString = (PCHAR)_malloca(cbFormatString);
if (!szDebugString)
return;
/* Populate the buffer with the contents of the format string. */
StringCbPrintfA(szDebugString, cbFormatString, "[%s:%d] ", kwszFunction, iLineNumber);
StringCbLengthA(szDebugString, cbFormatString, &st_Offset);
StringCbVPrintfA(&szDebugString[st_Offset / sizeof(CHAR)], cbFormatString - st_Offset, kszDebugFormatString, args);
OutputDebugStringA(szDebugString);
_freea(szDebugString);
va_end(args);
}